It would be difficult to express everything Azure is in just a few sentences, since it has hundreds of services and is constantly evolving.

We will see a couple of samples of things you can do with Microsoft Azure.

First, Microsoft Azure allows you to have cloud-based computing, it means that you can have your own data center, in the cloud, which in turns allows you to reduce costs in space, network(bandwidth, cables, hardware), electricity and hardware maintenance.

The first example we will see is Virtual Machines, Virtual Machines are "virtualized or emulated computer system based on the computer architecture and functions of a real or hypothetical computer"